DSPIC33EP16GS505-I/PT - 16KB 70MIPS DSC | Microchip
MPN: DSPIC33EP16GS505-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.46 | $34.60 |
| 100 | $3.1 | $310.00 |
| 500 | $2.79 | $1,395.00 |
| 1,000 | $2.51 | $2,510.00 |
DSPIC33EP16GS505-I/PT Overview
A Digital Signal Controller combines the computational throughput of a DSP with the peripheral integration and control-oriented architecture of a microcontroller. Within the power-management hierarchy, a DSC sits between a generic MCU and a dedicated digital power IC: it executes high-bandwidth control loops for voltage-mode, current-mode, and multi-loop power converters while retaining general-purpose programmability. The dsPIC33EP family is Microchip's 16-bit flash-based DSC line for embedded control.
Key differentiating features include an interconnected high-speed PWM module with dedicated time base, a high-speed 12-bit ADC supporting simultaneous sampling for multi-loop control, integrated comparators, and programmable gain amplifiers (PGA) optimized for current-sense feedback. According to the Microchip dsPIC33EPXXGS50X family datasheet (DS70005127), these peripherals are specifically architected to support common multi-loop digital SMPS topologies such as AC-to-DC converters, power factor correction (PFC), and DC-to-DC converters. The device is also recognized by Microchip as Functional Safety (FuSa) capable.
Typical applications include interleaved PFC front ends (Microchip offers a 350W universal-input interleaved PFC reference design based on this controller), LLC and phase-shifted full-bridge DC-DC converters, digital lighting ballasts, and solar micro-inverter control stages. The 70 MIPS core closes current loops fast enough for 100 kHz-plus switching frequencies.
Design consideration: budget flash carefully - 16KB is adequate for a single converter control loop with PI/PID compensation but tight for multi-converter systems with communication stacks; step to the 32KB or 64KB pin-compatible variants (DSPIC33EP32GS505-I/PT, DSPIC33EP64GS505-I/PT) if firmware may grow.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP16GS505-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DSPIC33EP16GS505-I/PT (same form factor and footprint) — differing in Functional Safety, Package, Core Architecture, ADC, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32GS505-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.55 / Unit
View Datasheet →DSPIC33EP64GS505-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP16GS505-E/PT
✅ Drop-In✓ In Stock
$3.93 / Unit
View Datasheet →DSPIC33EP32GS505-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GS505-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.45 / Unit
View Datasheet →DSPIC33EP16GS505-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP DSC |
| Maximum CPU Speed | 70 MIPS |
| Flash Memory | 16KB (16K x 8) |
| SRAM | 2KB |
| Package | 48-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Product Family | dsPIC33EP16GS50X (Digital Power / SMPS DSC) |
| PWM | High-Speed interconnected PWM for digital power |
| ADC | High-Speed 12-bit ADC |
| Analog Peripherals | Comparators, PGA (Programmable Gain Amplifiers) |
| Functional Safety | FuSa capable (per Microchip) |
| Target Applications | SMPS and digital power conversion |
| RoHS Status | Compliant |
| Typical Application Power | 350W interleaved PFC reference design |
DSPIC33EP16GS505-I/PT 48-tqfp (7x7 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP16GS505-I/PT (48-tqfp (7x7 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33EP16GS505-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP16GS505-I/PT is suitable for 6 applications: Interleaved Power Factor Correction (PFC), AC-to-DC Converter Control, DC-DC Converter Control (LLC / Half-Bridge), Digital Lighting Ballasts and LED Drivers, Solar Micro-Inverters and Renewable Power Conversion, Embedded Digital Power Development and Evaluation.
Interleaved Power Factor Correction (PFC)
The DSPIC33EP16GS505-I/PT is purpose-built for interleaved PFC: Microchip's official reference design pairs this SMPS DSC with a universal AC input front end delivering a high-voltage DC output up to 350W. The interconnected high-speed PWM natively produces the phase-shifted gate signals for two interleaved boost phases, while the high-speed ADC samples both inductor currents for average-current-mode control. The 70 MIPS DSP core executes the voltage and current loop compensation within each switching cycle at 100 kHz-class frequencies. Integrated comparators provide cycle-by-cycle overcurrent protection without CPU intervention, and the PGA scales current-sense signals for full ADC resolution. This topology reduces input ripple current and spreads thermal stress, directly benefiting from the DSC's deterministic loop timing.
Recommended
AC-to-DC Converter Control
For AC-to-DC power conversion, the DSPIC33EP16GS505-I/PT implements the full control stack: input voltage feed-forward, output voltage regulation, and inrush/soft-start sequencing. Per the DS70005127 family datasheet, the dsPIC33EPXXGS50X family explicitly supports common multi-loop digital SMPS topologies including AC-to-DC converters. The 16-bit core with DSP multiply-accumulate instructions computes PI/PID compensation deterministically, while the high-speed ADC triggers synchronously with the PWM period to sample the output at the correct instant, avoiding switching noise pickup. The 16KB flash is sufficient for a single-output AC-DC controller including fault handling and housekeeping. Comparators give hardware-level fault shutdown with programmable response, meeting typical surge and short-circuit protection requirements.
Recommended
DC-DC Converter Control (LLC / Half-Bridge)
Resonant and phase-shifted topologies such as LLC half-bridge and phase-shifted full-bridge demand precise, dead-time-accurate complementary PWM - exactly what the interconnected high-speed PWM module of the DSPIC33EP16GS505-I/PT provides. The PWM units support independent dead-time control, phase shifting, and frequency modulation required for resonant frequency tracking in LLC converters. The 70 MIPS core closes the output voltage loop through frequency or phase adjustment, and the high-speed ADC with PGA samples output current and voltage each cycle. Hardware comparators handle burst-mode and protection thresholds. The 48-pin TQFP offers enough GPIO for fan control, LED status, and I2C/SMBus telemetry demanded in server and telecom DC-DC bricks.
Recommended
Digital Lighting Ballasts and LED Drivers
High-intensity discharge (HID) ballasts and high-power LED drivers use the DSPIC33EP16GS505-I/PT for ignition sequencing, current regulation, and dimming control. The high-speed PWM generates both the low-frequency full-bridge drive and the high-frequency buck/boost regulation stage from one controller, cutting BOM cost versus discrete + MCU solutions. The 12-bit high-speed ADC monitors lamp/LED current with cycle-by-cycle accuracy, sustaining constant-current regulation across line and load transients. The 70 MIPS core manages lamp strike, warm-up, and fault-retry state machines deterministically. Comparators implement fast overcurrent shutdown protecting the power stage during lamp open/short events. The 16KB flash accommodates the full state machine with margin for DALI or 0-10V dimming interfaces.
Recommended
Solar Micro-Inverters and Renewable Power Conversion
In solar micro-inverter and MPPT stages, the DSPIC33EP16GS505-I/PT performs maximum-power-point tracking algorithms plus grid-side current shaping. Its DSP core executes MPPT perturb-and-observe or incremental-conductance routines at kHz rates while simultaneously running the inverter current control loop - feasible only because the 70 MIPS core with hardware MAC completes both computations per PWM period. The high-speed ADC samples panel voltage/current and grid voltage synchronously with PWM, and the interconnected PWM generates the required multi-phase, high-frequency switching patterns. Extended-temperature -E/PT variants survive rooftop enclosure temperatures up to 125C junction-adjacent ambient, improving design margin in sealed outdoor installations.
Recommended
Embedded Digital Power Development and Evaluation
The DSPIC33EP16GS505-I/PT is the recommended learning and development vehicle for Microchip's digital power ecosystem: it runs on the Microchip Interleaved PFC reference design and associated digital power development boards, supported by MPLAB X IDE, the XC16 compiler, and the Digital Compensator Design Tool for auto-generating loop coefficients. New power-electronics engineers can migrate firmware unchanged across the whole dsPIC33EP16GS50X family since peripherals are identical. The in-circuit programming interface supports rapid control-firmware iteration with real-time DMCI data visualization of ADC samples during loop tuning. This makes the part ideal for university power-electronics labs and initial product prototyping before committing to a flash size.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP16GS505-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32GS505-I/PT | DSPIC33EP64GS505-I/PT | DSPIC33EP16GS505-E/PT | DSPIC33EP32GS505-E/PT |
|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 16KB | 32KB | 64KB | 16KB | 32KB |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C |
| Digital Power Peripherals (PWM/ADC/PGA) | High-speed interconnected PWM, high-speed ADC, comparators, PGA | Identical | Identical | Identical | Identical |
Key Differentiators
- Lowest flash / lowest cost in the 48-pin GS505 family (vs DSPIC33EP32GS505-I/PT)
- Industrial temperature grade adequate for indoor power supplies (vs DSPIC33EP16GS505-E/PT)
- Future-proofing option in same footprint (vs DSPIC33EP64GS505-I/PT)
Design Notes
The 48-TQFP (7x7 mm) exposes the device to switching-node noise from the power stage it controls. Route the high-speed ADC sense traces (current-shunt and output-voltage feedback) away from PWM gate-drive traces and keep the analog reference decoupling (VDD/VSS pairs) tightly bypassed with 0.1uF ceramics at each supply pin pair. Use a solid ground plane and star-connect the controller ground to the power ground at a single point to prevent PWM return currents from corrupting ADC readings.
Verify ADC sampling is triggered synchronously with the PWM period (center of the off-time for current-mode sensing) rather than free-running; this eliminates switching-noise aliasing in the current loop. Configure the hardware comparators with appropriate DAC thresholds for cycle-by-cycle overcurrent protection so faults are handled in hardware without CPU latency - a software-only protection path at 100 kHz switching frequencies may react too slowly to protect the MOSFETs.
16KB flash is the smallest size in the GS505 family - a single control loop with PI compensation, fault handling, and housekeeping fits, but adding communication stacks (SMBus/PMBus), data logging, or multi-rail sequencing will overflow quickly. Estimated mitigation: if post-compile size exceeds ~70% of 16KB, reflow the same footprint with DSPIC33EP32GS505-I/PT - no PCB change is needed since pinout and peripherals are identical per the DS70005127 family datasheet.
Compliance Information
RoHS compliant and lead-free per Microchip standard policy and distributor listings. Formal REACH and conflict-minerals declarations should be downloaded from the Microchip product page compliance documents. This is a commercial/industrial device, not AEC-Q100 automotive qualified.
